Drive train unit for a hybrid vehicle, transmission unit and drive train

Abstract

A drive train unit for a hybrid vehicle includes an input shaft arranged for rotationally fixed attachment to an output of a transmission, an output shaft, an electric machine with a rotor, a clutch, and an actuating unit operatively connected to the clutch. The actuating unit has an actuator and an actuating bearing, displaceable by the actuator. The clutch may be a separating clutch operatively inserted between the rotor and the input shaft, or a friction clutch operatively inserted between the input shaft and the output shaft. The clutch may be a self-intensifying clutch with a leaf spring adjusted at a set angle relative to a reference plane oriented perpendicular to an axis of rotation such that, in a driving direction of a first clutch component, a first friction element is applied to a second friction element with an additional axial force.

The invention claimed is: 
     
       1. A drive train unit for a hybrid vehicle, comprising:
 an input shaft arranged for rotationally fixed attachment to an output of a transmission and comprising an axis of rotation; 
 an output shaft; 
 an electric machine comprising a rotor; 
 a friction clutch operatively inserted between the input shaft and the output shaft, the friction clutch comprising:
 a first clutch component comprising:
 a first carrier part; 
 a first friction element installed in the first carrier part; 
 a leaf spring unit comprising a leaf spring; and 
 a second carrier part rotationally fixed to the first carrier part by the leaf spring unit; and 
 
 a second clutch component comprising a second friction element, wherein, in a closed position of the friction clutch, the leaf spring is adjusted at a set angle relative to a reference plane oriented perpendicular to the axis of rotation such that, in a driving direction of the first clutch component, the first friction element is applied to the second friction element with an additional axial force; and 
 
 an actuating unit operatively connected to the friction clutch, the actuating unit comprising:
 an actuator; and 
 an actuating bearing, displaceable by the actuator. 
 
 
     
     
       2. The drive train unit of  claim 1 , wherein:
 the actuator is a lever actuator; or 
 the actuator is a hinge actuator. 
 
     
     
       3. The drive train unit of  claim 1 , wherein the friction clutch is a self-intensifying clutch. 
     
     
       4. The drive train unit of  claim 1 , wherein the leaf spring unit comprises a plurality of leaf springs arranged to form a leaf spring set. 
     
     
       5. The drive train unit of  claim 1 , wherein the first clutch component comprises a plurality of leaf spring units are arranged distributed along a circumference of the first carrier part or the second carrier part. 
     
     
       6. The drive train unit of  claim 1 , wherein the leaf spring unit is arranged radially inside of the first friction element and the second friction element. 
     
     
       7. The drive train unit of  claim 1 , further comprising an actuating force introduction mechanism, wherein:
 the actuating force introduction mechanism comprises:
 a lever element operatively connected to the actuator; or 
 a pressure pot operatively connected to the actuator; and 
 
 the actuating force introduction mechanism is arranged on the second carrier part. 
 
     
     
       8. The drive train unit of  claim 7 , wherein the actuating force introduction mechanism comprises a pressing plate:
 connected to the first carrier part; and 
 arranged to operate on the first friction element and the second friction element in a displaceable manner. 
 
     
     
       9. A transmission unit for a hybrid vehicle, comprising:
 the drive train unit of  claim 1 ; and 
 the transmission connected to the input shaft. 
 
     
     
       10. A drive train for a hybrid vehicle, comprising:
 the transmission unit of  claim 9 ; and 
 a differential gear coupled to the output shaft in a rotationally fixed manner.